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任艳芳. 浅埋深近距离煤层矿压及覆岩运动规律研究[J]. 煤炭科学技术, 2015, (7).
引用本文: 任艳芳. 浅埋深近距离煤层矿压及覆岩运动规律研究[J]. 煤炭科学技术, 2015, (7).
Ren Yanfang. Study on mine pressure and overlying strata movement law of contiguous seams with shallow depth[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (7).
Citation: Ren Yanfang. Study on mine pressure and overlying strata movement law of contiguous seams with shallow depth[J]. COAL SCIENCE AND TECHNOLOGY, 2015, (7).

浅埋深近距离煤层矿压及覆岩运动规律研究

Study on mine pressure and overlying strata movement law of contiguous seams with shallow depth

  • 摘要: 为解决浅埋深近距离煤层下位工作面外错巷道矿压显现强烈的问题,采用现场实测、理论分析和数值模拟的方法,对浅埋深近距离煤层巷道及工作面矿压显现规律进行了研究。结果表明:外错巷道围岩塑性破坏严重,实测最大片帮深度达3 m,部分煤块崩落喷出,给掘进施工带来了严重的安全隐患,造成此现象主要原因是巷道位于上覆煤柱应力集中区,并承载了煤柱附近基本顶离层区的载荷;内错巷道位于基本顶离层区下,矿压显现不明显;12.77 m的砂质泥岩直接顶可对工作面采空区进行有效充填,工作面矿压显现程度缓和。

     

    Abstract: In order to solve the intensively mine strata pressure behavior problem of the exterior alternate gateway in coal mining face in seam of contiguous seams wi th shallow depth,with the site measurement, theoretical analysis and numerical simulation method,study was conducted on the mine strata pressure behavior of the contigu ous seam gateway and coal mining face with a shallow depth. The results showed that the surrounding rock plasticity of the exterior alternate gateway was failed seriously, the max site measured spalling depth was up to 3 meters and partial coal blocks were falling and blowout. All those made serious safety hidden troubles to the gateway dri ving operation and the major causes of the phenomenon occurred were the stress concentrated zone of the overburden coal pillars above the gateway and stress concentr ated zone also born the load of the bed separation in the basic roof near the coal pillars. The interior alternate gateway was located under the basic bed separation and the mine strata pressure behavior was not obvious. The sandy mudstone direct roof with a thickness of 12. 77 meters could effectively backfill the goaf of the coal mining face and the mine strata pressure behavior of the coal mining face was relax.

     

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