浅埋房采区下近距离煤层开采动载矿压机理

发布时间：2018-05-16 21:12

本文选题：浅埋煤层 + 房采煤柱　；参考：《煤炭学报》2017年02期

【摘要】：浅埋煤层工作面房采区下开采易发动载矿压甚至压架等灾害事故。以石圪台矿31201综采工作面典型房采煤柱下动载矿压的案例为基础,采用现场实测、理论分析、数值模拟和物理模拟手段对此类动载矿压发生的机理进行深入研究。研究结果表明:房采煤柱较集中煤柱更易失稳破坏;在下煤层采动和超前支承压力的影响下,房采煤柱突然大范围的失稳破坏会导致其上方关键层发生超前断裂,关键块体的逆向回转将过大的覆岩载荷传递至下方岩层结构,最终导致下位关键块体发生滑落失稳,这是造成工作面发生强烈动载矿压的根本原因。针对易发此类动载矿压的条件,从阻止或转移上覆岩层载荷的角度提出几点针对性的防治措施,其有效性和实用性得到了31201工作面后续安全开采的证实。
[Abstract]:Mining under the roof of shallow coal face is easy to launch the disaster accident such as rock pressure and even pressure frame. Based on the case of dynamic bearing rock pressure under typical room pillar of 31201 fully-mechanized mining face in Shigetai Mine, the mechanism of this kind of dynamic bearing rock pressure is deeply studied by means of field measurement, theoretical analysis, numerical simulation and physical simulation. The results show that the roof pillar is more vulnerable to instability than the concentrated pillar, and under the influence of the mining movement of the lower coal seam and the leading bearing pressure, the sudden and large-scale instability of the roof pillar will lead to the leading fracture of the key layer above the pillar. The reverse rotation of the key block transfers the overburden load to the lower rock structure, which leads to the sliding and instability of the lower key block, which is the fundamental cause of the strong dynamic rock pressure in the working face. In view of the conditions which are prone to this kind of dynamic rock pressure, this paper puts forward several targeted prevention measures from the angle of preventing or transferring the overburden load. Its effectiveness and practicability are confirmed by the safety mining in the 31201 face.
【作者单位】：中国矿业大学深部煤炭资源开采教育部重点实验室矿业工程学院;中国矿业大学物联网(感知矿山)研究中心;矿山互联网应用技术国家地方联合工程实验室;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB227900)
【分类号】：TD323

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