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Back-and-forth mining for hard and thick coal seams—research about the mining technology for fully mechanized caving working face of Datong Mine
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作者 金智新 于红 +1 位作者 于斌 宋华岭 《Journal of Coal Science & Engineering(China)》 2005年第2期1-4,共4页
The article introduced the key technology, mining process, and back-and-forth mining method for the caving working face of hard-thick coal seams in Datong mine, and researched this innovations process, optimized the s... The article introduced the key technology, mining process, and back-and-forth mining method for the caving working face of hard-thick coal seams in Datong mine, and researched this innovations process, optimized the systemic design and working face out-play, tried to perfect the caving mining technology of hard-thick coal seams further. 展开更多
关键词 hard and thick coal seams fully mechanized caving working face back-and- forth mining
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Similar material simulation research on movement law of roof over-lying strata in stope of fully mechanized caving face with large mining height 被引量:2
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作者 ZHU Yong-jian PENG Gang 《Journal of Coal Science & Engineering(China)》 2010年第1期6-10,共5页
Similar material simulation test W9-15 101 fully mechanized caving face with was carried out in a geological model of large mining height in the Liuhuanggou Colliery, in Xinjiang Uigur Autonomous Region. The roof over... Similar material simulation test W9-15 101 fully mechanized caving face with was carried out in a geological model of large mining height in the Liuhuanggou Colliery, in Xinjiang Uigur Autonomous Region. The roof overlying strata movement law in the stope of a fully mechanized caving face with large mining height was studied and show that the roof overlying strata in the stope of a fully mechanized caving face with large mining height can be formed into a stable arch structure; the fracture rock beam is formed resembling a "bond beam", but it has essentially the structure of "multi-span beams" under the big structure of the stable arch. The roof overlying strata movement law in the stope of a fully mechanized caving face with large mining height is similar to that of the common, fully mechanized caving stope, which is determined by the deformation and instability of the structure of "multi-span beams". But because of the differences between the mining heights, the peak pressure in the stope of a fully mechanized caving face with large mining height is smaller while the affected area of abutment pressure is wider in the front of the working face; this is the obvious difference in abutment pressure between the stope of a fully mechanized caving face with large mining height and that of the common. 展开更多
关键词 fully mechanized caving face with large mining height STOPE roof overlyingstrata stable arch structure
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Technological optimization of fully mechanized caving mining face with large mining heights 被引量:1
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作者 Lu-Jia FAN Sheng-Li YANG 《Journal of Coal Science & Engineering(China)》 2013年第3期290-294,共5页
Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China's thick seam mining. In order... Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China's thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the caving process, based on the mechanized caving face 1302N in Longgu Coal Mine. This was achieved by improving the PFC numerical calculation methods, and establishing a more accurate model system. On this basis, the recovery ratio of the top coal in different drawing intervals and technologies was investigated in order to achieve a reasonable caving process. The top-coal tracking system was used for practical surveying of the recovery ratio of top coal. 展开更多
关键词 fully mechanized caving face large mining height caving process optimization numerical calculation by PFC top-coal tracking system
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Surface Movement Regularity of Super-Wide Mining Face With Top-Coal Caving 被引量:1
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作者 RENRun-hou 《Journal of China University of Mining and Technology》 EI 2005年第1期68-71,共4页
No.4326 super-wide panel of Wangzhuang Coal Mine ( in which the fully-mechanized top-coal caving longwall mining method was used) was monitored for dynamic characteristic of surface movement. The dynamic surface movem... No.4326 super-wide panel of Wangzhuang Coal Mine ( in which the fully-mechanized top-coal caving longwall mining method was used) was monitored for dynamic characteristic of surface movement. The dynamic surface movement in and after mining was predicted by using the Mining Subsidence Prediction System. The results indicate that after mining, the surface above the super-wide panel reaches a state of full subsidence, making the No.309 national highway above the panel be located on the flat bottom of the subsidence basin so that the influence of mining activity in both sides of 4326 panel on the national highway is the smallest. 展开更多
关键词 super-wide mining face with top-coal caving surface subsidence strata movement ground pressure
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Ground pressure and overlying strata structure for a repeated mining face of residual coal after room and pillar mining 被引量:10
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作者 Jiang Bangyou Wang Lianguo +2 位作者 Lu Yinlong Sun Xiaokang Jin Gan 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期645-652,共8页
To investigate the abnormal ground pressures and roof control problem in fully mechanized repeated mining of residual coal after room and pillar mining, the roof fracture structural model and mechanical model were dev... To investigate the abnormal ground pressures and roof control problem in fully mechanized repeated mining of residual coal after room and pillar mining, the roof fracture structural model and mechanical model were developed using numerical simulation and theoretical analysis. The roof fracture characteristics of a repeated mining face were revealed and the ground pressure law and roof supporting condi- tions of the repeated mining face were obtained. The results indicate that when the repeated mining face passes the residual pillars, the sudden instability causes fracturing in the main roof above the old goal and forms an extra-large rock block above the mining face. A relatively stable "Voussoir beam" structure is formed after the advance fracturing of the main roof. When the repeated mining face passes the old goaf, as the large rock block revolves and touches gangue, the rock block will break secondarily under overburden rock loads. An example calculation was performed involving an integrated mine in Shanxi province, results showed that minimum working resistance values of support determined to be reason- able were respectively 11,412 kN and 10,743 kN when repeated mining face passed through residual pillar and goaf. On-site ground pressure monitoring results indicated that the mechanical model and support resistance calculation were reasonable. 展开更多
关键词 Residual coal after room and pillar mining Repeated mining Fully mechanized caving face Roof control Support resistance
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STUDY ON PRODUCTION SYSTEM OPERATION REGULARITY OF FULLY MECHANIZED SUBLEVEL CAVING MINING AND SEQUENTIAL OPERATION
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作者 李学忠 王新淮 陈永文 《Journal of Coal Science & Engineering(China)》 1998年第1期30-35,共6页
According to a lot of practical data in Liujialiang Mine and reliability theory and result of computer simulation, operation regularity of fully mechanized sublevel caving mining production system in the condition of ... According to a lot of practical data in Liujialiang Mine and reliability theory and result of computer simulation, operation regularity of fully mechanized sublevel caving mining production system in the condition of gently inclined complicated geological structure and production shortcomings are found out and reliability of system and output of the working face are predicted finally. 展开更多
关键词 fully mechanized sublevel caving mining face sequential operation computer simulation reliability theory
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大采高综采工作面末采片帮治理研究
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作者 张宇航 《能源与节能》 2025年第1期225-227,共3页
针对大采高综采工作面末采期间煤壁稳定性差、片帮等问题,以5607大采高工作面为研究对象,结合实际地质条件分析了片帮影响因素并提出以提高煤体强度为主的片帮治理措施。依据现场情况,提出在采面回采巷道内、主撤巷道内布置注浆钻孔,对... 针对大采高综采工作面末采期间煤壁稳定性差、片帮等问题,以5607大采高工作面为研究对象,结合实际地质条件分析了片帮影响因素并提出以提高煤体强度为主的片帮治理措施。依据现场情况,提出在采面回采巷道内、主撤巷道内布置注浆钻孔,对末采阶段煤体进行加固,并具体给出注浆加固技术方案。工程应用后,末采范围内破碎煤体得到有效加固,工作面末采期间基本不出现片帮情况,为5607大采高工作面高效收尾创造了良好条件。 展开更多
关键词 厚煤层 大采高综采工作面 破碎煤体 片帮治理
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特厚煤层综放工作面大角度转采工艺的应用
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作者 曹志勇 《能源与节能》 2025年第1期234-237,共4页
长春兴煤业井田范围内断层、陷落柱发育,整体地质构造较为复杂,断层对盘区采掘布局影响较大。基于此,长春兴煤业在22309工作面采用大角度转采技术,不但缩短了掘进巷道距离,减少了搬家倒面次数,而且有效提升了煤炭资源回收率。结合长春... 长春兴煤业井田范围内断层、陷落柱发育,整体地质构造较为复杂,断层对盘区采掘布局影响较大。基于此,长春兴煤业在22309工作面采用大角度转采技术,不但缩短了掘进巷道距离,减少了搬家倒面次数,而且有效提升了煤炭资源回收率。结合长春兴煤业现场实际情况,通过分析固定点转采和不固定点转采2种转采技术的优缺点,最终认为不固定点转采技术更加有利于22309工作面的采煤管理。长春兴煤业22309工作面转采技术的成功实践,为其他矿井的特厚煤层转采提供了有益借鉴。 展开更多
关键词 特厚煤层 综放工作面 大角度转采
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Systematic principles of surrounding rock control in longwall mining within thick coal seams 被引量:9
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作者 Jiachen Wang Zhaohui Wang 《International Journal of Mining Science and Technology》 EI CSCD 2019年第1期65-71,共7页
Effective surrounding rock control is a prerequisite for realizing safe mining in underground coal mines.In the past three decades, longwall top-coal caving mining(LTCC) and single pass large height longwall mining(SP... Effective surrounding rock control is a prerequisite for realizing safe mining in underground coal mines.In the past three decades, longwall top-coal caving mining(LTCC) and single pass large height longwall mining(SPLL) found expanded usage in extracting thick coal seams in China. The two mining methods lead to large void space left behind the working face, which increases the difficulty in ground control.Longwall face failure is a common problem in both LTCC and SPLL mining. Such failure is conventionally attributed to low strength and high fracture intensity of the coal seam. However, the stiffness of main components included in the surrounding rock system also greatly influences longwall face stability.Correspondingly, surrounding rock system is developed for LTCC and SPLL faces in this paper. The conditions for simultaneous balance of roof structure and longwall face are put forward by taking the stiffness of coal seam, roof strata and hydraulic support into account. The safety factor of the longwall face is defined as the ratio between the ultimate bearing capacity and actual load imposed on the coal wall.The influences provided by coal strength, coal stiffness, roof stiffness, and hydraulic support stiffness,as well as the movement of roof structure are analyzed. Finally, the key elements dominating longwall face stability are identified for improving surrounding rock control effectiveness in LTCC and SPLL faces. 展开更多
关键词 LONGWALL top coal caving mining Single PASS large HEIGHT LONGWALL mining SURROUNDING rock system LONGWALL face stability
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Research on Feasibility of Top-Coal Caving Based on Neural Network Technique
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作者 王家臣 吴志山 +2 位作者 冯士伟 沈掌旺 侯社伟 《Journal of China University of Mining and Technology》 2001年第1期10-13,共4页
Based on the neural network technique, this paper proposes a BP neural network model which integrates geological factors which affect top coal caving in a comprehensive index. The index of top coal caving may be used ... Based on the neural network technique, this paper proposes a BP neural network model which integrates geological factors which affect top coal caving in a comprehensive index. The index of top coal caving may be used to forecast the mining cost of working faces, which shows the model’s potential prospect of applications. 展开更多
关键词 top coal caving neural network mining cost of working face
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综放工作面围岩控制与智能化放煤技术现状及展望 被引量:1
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作者 庞义辉 关书方 +2 位作者 姜志刚 白云 李鹏 《工矿自动化》 CSCD 北大核心 2024年第9期20-27,共8页
分析了厚及特厚煤层智能化综放工作面围岩控制技术与智能化放顶煤技术发展现状及存在的问题,从巷道围岩高效支护、工作面超前支护、坚硬特厚顶煤冒放性、液压支架位姿监测及智能化放顶煤5个方面提出了工程实际需求。针对综放工作面实现... 分析了厚及特厚煤层智能化综放工作面围岩控制技术与智能化放顶煤技术发展现状及存在的问题,从巷道围岩高效支护、工作面超前支护、坚硬特厚顶煤冒放性、液压支架位姿监测及智能化放顶煤5个方面提出了工程实际需求。针对综放工作面实现安全、高效、智能化开采存在的技术难题与工程需求,对综放工作面围岩控制技术、智能化放煤技术进行了研究:构建了坚硬特厚煤层顶煤悬臂梁力学模型,研发了提高顶煤冒放性及放出率关键技术,实现了坚硬特厚煤层超大采高综放开采;研发了单元式超前液压支架顶梁可旋转自复位装置,实现了液压支架顶梁根据巷道顶板倾斜角度自动旋转支护,有效提高了单元式超前液压支架对巷道顶底板的适应性;提出了采用巷道支护液压支架替代传统锚网支护结构的思路,具有支护效率高、成本低、节省工作面超前支护等优点;开发了基于立柱与尾梁千斤顶行程的综放液压支架支护姿态监测装置与算法,提高了液压支架支护姿态解算效率与精度;提出了基于透明地质模型、煤量监测装置与煤矸识别装置融合的智能放煤控制方法,可有效解决多夹矸层特厚顶煤智能化放煤技术难题。提出智能地质保障技术、机器视觉精准测量与智能感知技术、综放工作面设备智能精准自适应控制技术、综放工作面数字孪生技术等是智能化综放开采技术与装备的发展趋势。 展开更多
关键词 特厚煤层 综放开采 综放工作面 围岩控制 智能化放煤
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山西五家沟煤矿深孔强制放顶爆破方案设计
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作者 朱长江 张军 《科技创新与生产力》 2024年第3期140-141,共2页
本文通过对山西五家沟煤矿回采工作面工程概况和地质水文状况进行分析,应用深孔爆破强制放顶技术原理,合理设计出该矿回采工作面的深孔爆破方案,后期又设计出新型分段式装药爆破试验方法,为安全高效地完成该矿的生产任务提供了有力的技... 本文通过对山西五家沟煤矿回采工作面工程概况和地质水文状况进行分析,应用深孔爆破强制放顶技术原理,合理设计出该矿回采工作面的深孔爆破方案,后期又设计出新型分段式装药爆破试验方法,为安全高效地完成该矿的生产任务提供了有力的技术支持。 展开更多
关键词 地质概况 回采工作面 深孔强制放顶 爆破方案
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两次采动影响下小煤柱巷道切顶卸压围岩控制技术 被引量:3
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作者 李汉璞 张百胜 +2 位作者 郭俊庆 杨依卓 崔俊彪 《矿业安全与环保》 CAS 北大核心 2024年第2期90-97,共8页
为解决多次采动影响下留小煤柱巷道矿压显现剧烈、围岩变形量大的问题,提出了“切顶卸压+顶、帮锚索补强”联合控制技术。以贾家沟煤矿10115运输巷为工程背景,分析了切顶卸压位置、高度与巷道围岩垂直应力分布的关系,给出切顶卸压关键参... 为解决多次采动影响下留小煤柱巷道矿压显现剧烈、围岩变形量大的问题,提出了“切顶卸压+顶、帮锚索补强”联合控制技术。以贾家沟煤矿10115运输巷为工程背景,分析了切顶卸压位置、高度与巷道围岩垂直应力分布的关系,给出切顶卸压关键参数,并研究了留小煤柱巷道在切顶卸压后受两次采动影响下的矿压显现规律。结果表明:切顶卸压后,煤柱上的应力峰值随切顶深度的增加呈指数降低;10115运输巷在邻近工作面一次采动过程中巷道围岩变形依次呈现出无变形、缓慢变形、快速变形和围岩稳定的变化规律,本工作面二次采动过程中巷道围岩变形依次呈现出明显变形和剧烈变形的规律;巷道围岩在受二次采动影响时变形更加剧烈,巷道变形量为一次采动时的3.0~7.5倍。 展开更多
关键词 切顶卸压 小煤柱 矿压显现 二次采动 综放工作面 围岩控制
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近距离煤层厚硬顶板综放开采强矿压显现规律研究
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作者 王连生 李松涛 +2 位作者 代鹰 李瀚琛 杨龙 《煤炭技术》 CAS 2024年第7期74-79,共6页
针对厚硬顶板大采高综放工作面回采过程中强矿压的现象,以神东矿区某矿井近距离煤层厚硬顶板综放工作面为背景,通过现场实测和室内试验等方式,研究工作面矿压显现规律及覆岩破断特征。研究表明:(1)42105综放工作面老顶初次来压步距大,... 针对厚硬顶板大采高综放工作面回采过程中强矿压的现象,以神东矿区某矿井近距离煤层厚硬顶板综放工作面为背景,通过现场实测和室内试验等方式,研究工作面矿压显现规律及覆岩破断特征。研究表明:(1)42105综放工作面老顶初次来压步距大,来压强度高,远超工作面支架额定工作阻力,工作面呈现出中部来压集中、强度高且较为频繁的特征;(2)近距离厚硬顶板下回采工作面时,重复采动下工作面覆岩破坏高度更大,尤其是上位关键层破断后带动下位关键层同时破断,并带动其控制的上覆岩层及上方采空区同步下沉,岩层载荷逐层向下传导至工作面,上下位关键层破断的协同作用,从而造成了工作面来压强烈。 展开更多
关键词 厚硬顶板 综放工作面 矿压显现 相似模拟 覆岩破断
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煤矿大倾角综放工作面采煤参数及采煤工艺优化分析 被引量:1
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作者 任振华 《能源与节能》 2024年第5期114-117,共4页
以A煤矿26514工作面为例,介绍了一种基于有限元分析的煤矿大倾角综放工作面采煤参数及采煤工艺优化方法。该方法根据煤矿大倾角综放工作面参数构建相应的有限元模型,通过有限元模型的分析寻找现有工作面采煤参数与采煤工艺的缺陷,进而... 以A煤矿26514工作面为例,介绍了一种基于有限元分析的煤矿大倾角综放工作面采煤参数及采煤工艺优化方法。该方法根据煤矿大倾角综放工作面参数构建相应的有限元模型,通过有限元模型的分析寻找现有工作面采煤参数与采煤工艺的缺陷,进而以此为基础制定工作面采煤参数与采煤工艺优化方案。研究对大倾角综放工作面的开采具有重要意义。 展开更多
关键词 大倾角 综放工作面 采煤参数 采煤工艺
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81104工作面过构造区域开采方案优化分析 被引量:1
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作者 李骏 《江西煤炭科技》 2024年第1期15-17,21,共4页
根据阳煤二矿81104综放工作面构造预测及钻探结果,判定工作面内褶曲构造发育;结合工作面煤层变化趋势、顶底板岩性及机组割岩能力等方面分析,该构造对工作面正常回采影响较大区域为1 050~1 250 m(进风侧0~100 mm范围内);拟定“硬过构造... 根据阳煤二矿81104综放工作面构造预测及钻探结果,判定工作面内褶曲构造发育;结合工作面煤层变化趋势、顶底板岩性及机组割岩能力等方面分析,该构造对工作面正常回采影响较大区域为1 050~1 250 m(进风侧0~100 mm范围内);拟定“硬过构造区域”、“构造区整体跳采”、“构造区绕巷跳采”三种过构造开采方案进行比较,即从矿井生产、技术、通风、经济效益等方面进行综合分析后,认为“绕巷跳采”方案准备时间最短、经济效益最好,为最优方案。 展开更多
关键词 综放工作面 褶曲构造 开采方案 绕巷跳采 经济技术比较
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综放工作面智能化升级改造与应用 被引量:1
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作者 袁泉 《陕西煤炭》 2024年第4期91-94,共4页
智能化不仅是煤矿转型升级的新途径,也是新时代背景下煤炭开采技术革新的前进方向,更是煤炭工业高质量发展的必由之路。以山西中煤东坡煤矿915综放工作面为智能化升级改造对象,结合工作面开采技术条件和现场设备实际配置情况,按照智能... 智能化不仅是煤矿转型升级的新途径,也是新时代背景下煤炭开采技术革新的前进方向,更是煤炭工业高质量发展的必由之路。以山西中煤东坡煤矿915综放工作面为智能化升级改造对象,结合工作面开采技术条件和现场设备实际配置情况,按照智能化采煤工作面建设指南及验收管理办法的相关要求,在合理控制投资的前提下提出了具有针对性的中级智能化综放工作面改造目标、系统架构和升级方案,完成了对采煤、支护、供液、人员定位及视频监控等子系统的智能化升级。升级改造后实现了工作面采煤机记忆截割、支架一键放煤、自动跟机、实时视频监控、地面及井下远程可视化控制、各系统协同控制等功能,达到了“增安、减人、提效”的目的,对类似条件下智能化采煤工作面建设具有一定的参考意义。 展开更多
关键词 综放工作面 改造目标 智能化开采 系统架构 记忆截割
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近距离采空区下综放工作面安全高效回撤工艺研究
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作者 李洋 李硕 李慧敏 《煤炭技术》 CAS 2024年第11期71-75,共5页
综放工作面由于设备多、设备型号大,末采期间工作面顶板管理较综采工作面复杂,对于采空区下综放工作面,在回撤期间对顶板要求更高,国内外没有可以借鉴的经验。内蒙古福城矿业有限公司1502N为近距离采空区下放顶煤工作面,通过对工作面停... 综放工作面由于设备多、设备型号大,末采期间工作面顶板管理较综采工作面复杂,对于采空区下综放工作面,在回撤期间对顶板要求更高,国内外没有可以借鉴的经验。内蒙古福城矿业有限公司1502N为近距离采空区下放顶煤工作面,通过对工作面停采位置、层位、工作面顶板支护方案等方面进行全面论证,保证工作面末采及回撤期间的顶板安全。 展开更多
关键词 采空区下 综放工作面 末采 回撤支护
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24110工作面强制放顶安全管理
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作者 赵贺 《科技创新与应用》 2024年第24期146-149,154,共5页
为减小24110综采工作面初次来压时顶板大面积垮落而形成的飓风,避免造成工作面设备和施工人员受伤,采用深孔预裂爆破技术强制放顶,根据煤层顶板破拆原理,并结合4上号煤层顶板实际情况,58个炮眼分别设计在工采面两条顺槽内,以保证工采面... 为减小24110综采工作面初次来压时顶板大面积垮落而形成的飓风,避免造成工作面设备和施工人员受伤,采用深孔预裂爆破技术强制放顶,根据煤层顶板破拆原理,并结合4上号煤层顶板实际情况,58个炮眼分别设计在工采面两条顺槽内,以保证工采面初压时的安全生产。 展开更多
关键词 综采工作面 初次来压 预裂爆破 强制放顶 炮眼
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新景矿综采工作面自燃“三带”范围分布规律研究
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作者 陈守钰 《煤炭与化工》 CAS 2024年第2期126-129,共4页
山西新景矿15317综放工作面属于Ⅱ类自燃煤层,为确保安全推进速度,需要对采空区自燃“三带”进行测定。此次测定利用煤自然发火临界氧浓度指标来划分,采用束管监测监控技术对15317综放工作开采期间采空区氧气浓度进行了实测,并据此对采... 山西新景矿15317综放工作面属于Ⅱ类自燃煤层,为确保安全推进速度,需要对采空区自燃“三带”进行测定。此次测定利用煤自然发火临界氧浓度指标来划分,采用束管监测监控技术对15317综放工作开采期间采空区氧气浓度进行了实测,并据此对采空区自燃“三带”进行了划分,同时计算了工作面的最小安全推进速度,为工作面安全开采提供了数据支持。 展开更多
关键词 综放工作面 自燃“三带” 安全开采
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