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深部复杂地质条件岩巷底鼓变形机理分析与支护技术 被引量:1
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作者 吕学晓 《内蒙古煤炭经济》 2019年第18期225-225,227,共2页
对煤矿进行开采的时候,必须要在矿井下面进行巷道的布置,但是巷道却会受到地质情况、水等原因的影响而产生很大的形变,巷道的底板隆起的情况就叫作巷道底鼓。巷道的底鼓可能会影响通风、路人、运输等,对于矿井工作的推进有着影响。本文... 对煤矿进行开采的时候,必须要在矿井下面进行巷道的布置,但是巷道却会受到地质情况、水等原因的影响而产生很大的形变,巷道的底板隆起的情况就叫作巷道底鼓。巷道的底鼓可能会影响通风、路人、运输等,对于矿井工作的推进有着影响。本文对深部复杂地质条件下岩巷底鼓变形机理分析与支护技术。 展开更多
关键词 深部复杂地质条件 岩巷底鼓 变形机理 分析 支护技术
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Control technology for floor heave of Jurassic soft rock in the Erdos Basin of China: A case study 被引量:3
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作者 WEN Zhi-jie JING Suo-lin +1 位作者 MENG Fan-bao JIANG Yu-jing 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第12期4051-4065,共15页
The deformation of soft rock roadway caused by floor heave is a major challenge for coal mines in China western mining areas. To achieve security and stability of soft rock roadway, this work considered the headgate a... The deformation of soft rock roadway caused by floor heave is a major challenge for coal mines in China western mining areas. To achieve security and stability of soft rock roadway, this work considered the headgate at panel 11505 of the Yushujing Coal Mine as background. First, based on the limit equilibrium method and slip line field theory,a model of floor heave was established, the mechanism of floor heave control was analyzed, and an optimized support method was proposed. Then, the displacement, stress and failure zones around the surrounding rock with the original and optimized support were studied by FLAC. Finally, the serviceability of the support method was verified by field application. The results showed that the main deformation form of soft rock roadway is floor heave, and 0.5 m is relatively reasonable thicknesses of the inverted arch. The extrusion failure zone and shear failure zone were mainly affected by tensile and shear failure, respectively. The modification of floor and the effective support are key points. The failure zone was consistent between numerical simulation and theoretical calculation. The maximum convergences of floor heave determined by numerical simulation and field measurement were 220 mm and 240 mm, respectively, which were reduced by 55% and 60% compared with the original support, and the convergence between sidewalls decreased considerably. The optimized support method controls the floor heave well. 展开更多
关键词 soft rock roadway floor heave mechanical model control mechanism optimized support
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Numerical simulation of grooving method for floor heave control in soft rock roadway 被引量:28
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作者 Sun Jin wang Lianguo 《Mining Science and Technology》 EI CAS 2011年第1期49-56,共8页
Grooving method can restrain the deformation and destruction of surrounding rock by transferring the maximum stress to deep rock,bringing about the effective control for floor heave in soft rock roadway. Based on this... Grooving method can restrain the deformation and destruction of surrounding rock by transferring the maximum stress to deep rock,bringing about the effective control for floor heave in soft rock roadway. Based on this important effect,and to discuss the relationship between cutting parameters and pressurerelief effect,this paper carried out a numerical simulation of grooving along bottom slab and two sides of gateway with finite difference software FLAC^(2D).The results show that the control effect on floor heave in soft rock tunnel can be improved by selecting appropriate cutting parameters.Appropriately increasing the crevice depth in the middle of the floor can improve the stress state of bottom slab by stress transfer. So the floor heave can be more effectively controlled.To lengthen the crevice in the corners of roadway can simultaneously transfer the maximum stresses of bottom slab and two sides to deep rock,and promote the pressure-relief effect.Extending the crevice length and crevice width on both sides within a certain range can decrease the stress concentration in the corners of roadway,and reduce the deformation of two sides.The cutting position beneficial to restrain the floor heave is close to the bottom slab. 展开更多
关键词 Grooving Floor heave Cutting parameters Pressure-relief effect
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Deformation control of asymmetric floor heave in a deep rock roadway:A case study 被引量:11
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作者 Sun Xiaoming Wang Dong +2 位作者 Feng Jili Zhang Chun Chen Yanwei 《International Journal of Mining Science and Technology》 SCIE EI 2014年第6期799-804,共6页
In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures u... In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures using the finite difference method (FLAC^3D) combined with comparative analysis and typical engineering application at Xingcun coal mine, It is indicated by the analysis that the simple symmetric support systems used in the past led to destruction of the deep rock roadway from the key zone and resulted in the deformation of asymmetric floor heave in the roadway. Suitable rein- forced support countermeasures are proposed to reduce the deformation of the floor heave and the potential risk during mining. The application shows that the present support technology can he used to better environmental conditions. The countermeasures of asymmetric coupling support can not only effectively reduce the discrepancy deformation at the key area of the surrounding rock mass, hut also effectively control floor heave, which helps realize the integration of support and maintain the stability of the deep rock roadways at Xingcun coal mine. 展开更多
关键词 Deep rock roadway Asymmetric floor heave Numerical simulation Asymmetric reinforced support
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