数码电子雷管在井工煤矿应用的可行性分析

随着电子雷管技术的推广,数码电子雷管已在金属矿山、露天煤矿或隧道等工程领域成功应用,但在井工煤矿的应用尚不清楚。本文基于数码电子雷管的产品特点,围绕数码电子雷管应用于井工煤矿的相关影响因素展开分析,结合相关案例和数据就数码电子雷管在井工煤矿应用的市场环境、产品来源、生产成本、操作技术、政策保障和工程应用等进行综合分析,提出了数码电子雷管应用于井工煤矿的合理化建议。

井工一矿4号及9号煤层防灭火技术

从煤的炭化程度、含硫量以及矿井生产工艺3方面对井工一矿4号、9号煤层进行自燃风险的分析,4号、9号煤层具有自燃倾向性,结合该矿实际生产情况, 4号、9号煤层在正常回采期间采用加快工作面推进速度、灌浆防灭火和注氮防灭火综合防灭火措施,当工作面推进速度缓慢或者出现特殊情况时需增加其他防灭火措施,同时建立完善的火灾监测监控制度,加强预测预报,确保矿井安全生产。

山西平朔井工三矿煤系角砾岩特殊成因探讨

平朔井工三矿煤系角砾岩成因和产状特殊,与煤层关系密切。通过补勘钻孔岩心观测,结合区域地质和以往钻孔资料分析,详细描述研究区角砾岩的成分、结构和构造特征,圈定角砾岩的层位、厚度和分布状况。发现平朔井工三矿角砾岩成分复杂、大小不一,其中泥岩砾径最大可达1.20 m以上,以棱角状为主,分选性极差;角砾岩体顶底界面明显,临近或出现在煤层中,横向连续性差。角砾岩破坏了煤层的连续性,总体北多南少,分布有限,呈透镜状产出,长轴指向西北物源区;垂向上,角砾岩自下而上减少。研究认为,聚煤期植物锚固作用强大,陆源边坡及碎屑受植被禁锢,只能在限定的范围内垂向加积,累积成边坡较陡的碎屑库;泥炭沼泽表层为植被泥炭交织在一起的泥炭网,底部深度降解的膏状泥炭提供了有利的滑移面。突发事件导致物源区边坡和角砾质碎屑库崩塌,冲越到泥炭网上,撕裂成"泥炭筏",被泥炭筏载运移,断续沉积,并遭受改造。角砾岩成因及分布规律对煤层成因及厚度变化、煤炭资源/储量估算与开采具有重要指导意义。煤系、特别是煤层中沉积角砾岩的成因用泥炭筏载运移模式解释可能更为合理。

井工一矿19109工作面陷落柱治理研究

通过分析井工一矿19109工作面的地质条件,结合物探对疑似陷落柱区域的确定,再采用钻探的方法进一步确定19109工作面陷落柱的位置和范围,位于19109工作面800 m处陷落柱长50 m、宽40 m、面积2 000 m2、现涌水量125 m3/h,19109工作面底板距奥灰界面39 m。根据陷落柱的位置并结合井工一矿邻近工作面的矿压观测数据,确定陷落柱的加固厚度不得小于45 m,且分3个水平进行注浆加固。注浆方式采用单液浆与双液浆相结合,注浆前需对受注点相关条件进行掌握同时还根据注浆过程中的实际情况及时进行浆液参数配比的校正,正常注浆时压力设定为1~3.5 MPa,终压3.5 MPa。注浆效果的验证采用物探和钻探相结合,确保注浆加固起到阻水效果和工作面回采安全。

基于IAHP-SPA的井工煤矿安全风险辨识评估模型构建及应用

井工煤矿井下系统中易形成复杂、多变的不确定性安全风险因素,因此建立井工煤矿安全风险辨识评估模型显得尤为重要。本文建立了基于人员安全风险、管理安全风险、设施设备安全风险、作业环境安全风险、安全文化因素、安全信息因素、技术装备保障安全风险、井工煤矿固有安全风险8个维度的井工煤矿安全风险辨识评估指标体系,结合区间层次分析法和集对分析理论,建立了IAHP-SPA的井工煤矿安全风险辨识评估数学模型。通过实证分析,得到各个指标的风险等级,验证了该模型的可行性和实用性。

针刺配合腰骶刺络放血治疗慢性前列腺炎

Objective:To observe the effect of acupuncture and bloodletting therapy at the lumbosacral region for chronic prostatitis.Methods:A total of 36 patients with chronic prostatitis were collected,and treated in the Department of Acupuncture and Moxibustion and the External Treatment Center of Chinese Medicine,Affiliated Hospital of Shandong University of Traditional Chinese medicine.The patients were treated with acupuncture,combined with bloodletting therapy at the lumbosacral region.The treatment for 4 weeks was as one course and 2 consecutive courses of treatment were required.The therapeutic effect,including the score of the National Institute of Health-Chronic prostatitis symptom index(NIH-CPSI),was assessed.Results:After 1 and 2 courses of treatment,the symptom scores and NIH-CPSI total score were all reduced as compared with that before treatment,respectively(all P<0.01).After 2 courses of treatment,the score of each symptom and NIH-CPSI total score were reduced as compared with that after 1 course of treatment,respectively(all P<0.01).Regrading the 3 syndromes/patterns of chronic prostatitis in the patients,i.e.downward invasion of damp heat,qi and blood stagnation and liver qi stagnation,after 1 and 2 courses of treatment,NIH-CPSI total scores were all reduced as compared with that before treatment(all P<0.01).Additionally,after 2 courses of treatment,NIH-CPSI total score of each syndrome/pattern was reduced as compared with that after 1 course of treatment(all P<0.01).For kidney yin deficiency,after 2 courses of treatment,NIH-CPSI total score was reduced as compared with that either before treatment or after 1 course of treatment(both P<0.01).The total effective rate was 91.67%after 1 course of treatment and 97.22%after 2 courses of treatment.No obvious adverse events occurred during the treatment.Conclusion:The combined treatment with acupuncture and bloodletting therapy at the lumbosacral region effectively relieves the symptoms of chronic prostatitis and improves the quality of life in the patients.