不等长工作面台阶区域覆岩运动诱冲机制及防治

doi:10.16285/j.rsm.2016.11.030

›› 2016, Vol. 37 ›› Issue (11): 3283-3290.doi: 10.16285/j.rsm.2016.11.030

不等长工作面台阶区域覆岩运动诱冲机制及防治

李杨杨¹，张士川¹，高立群²，孔德志¹，孔贺¹

1.山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地，山东青岛 266590； 2.山东济矿鲁能煤电股份有限公司阳城煤矿，山东济宁 272000

收稿日期:2015-12-30 出版日期:2016-11-11 发布日期:2018-06-09
通讯作者: 张士川，男，1989年生，博士研究生，主要从事煤矿特殊开采方面的研究工作。E-mail: 373260186@qq.com E-mail:lyy1987718@126.com
作者简介:李杨杨，男，1987年生，博士，讲师，主要从事冲击地压及岩石力学方面的教学与研究工作。
基金资助:
国家自然科学基金资助项目（No. 51274132）；山东省自然科学基金资助项目（No. 2016ZRB019TW）；河南省矿产资源绿色高效开采与综合利用重点实验室开放基金资助项目（No. S201610）。

Mechanism and prevention of pressure burst in step region based on overburden strata movement of unequal length working face

LI Yang-yang¹, ZHANG Shi-chuan¹, GAO Li-qun², KONG De-zhi¹, KONG He¹

1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 2. Yangcheng Mine, Shandong Jikuang Luneng Coal and Electric Power Company Ltd, Jining, Shandong 272000, China

Received:2015-12-30 Online:2016-11-11 Published:2018-06-09
Supported by:
This work was supported by the National Natural Science Foundation of China (51274132), the Program of National Natural Science Foundation of Shandong Province(2016ZRB019TW) and the Research Fund of Henan Key Laboratory for Green and Efficient Mining and Comprehensive Utilization of Mineral Resources(S201610).

摘要/Abstract

摘要： 针对阳城煤矿不等长工作面台阶区域发生冲击地压灾害问题，基于工作面特殊布置方式及覆岩赋存特征，采用理论分析、数值模拟和现场实测等方法，分析了台阶区域覆岩结构运动特征和围岩应力演化规律，研究了台阶区域冲击地压诱发机制。研究结果表明：1304工作面台阶区域覆岩经历了“OX-S-C”型较为复杂的结构演变，覆岩空间结构由OX向S型转换时，顶板岩层大面积破断下沉，在台阶区域形成多个悬臂梁结构，越往高位，悬臂梁长度越大；受覆岩运动和采动应力场叠加影响，煤岩体形成高应力集中区，在顶板岩层动载冲击作用下，煤岩体弹性应变能突然释放，诱发冲击地压。采用COMSOL软件对不同卸压钻孔参数下煤体应变能分布特征进行模拟研究，优化了台阶区域卸压钻孔参数。根据模拟结果，随着钻孔孔径、孔深增大及间距减小钻孔卸压效果越明显，考虑工程实际，确定孔径为150 mm、孔深为30 m、间距为1 m为合理有效的卸压钻孔参数，并应用于1302工作面台阶区域的冲击地压防治，取得了较好的防冲效果。

关键词: 不等长工作面, 台阶区域, 冲击地压, 覆岩运动, 钻孔卸压

Abstract: For the problem of pressure burst disaster in step region of unequal length working face in Yangcheng coal, based on the special arrangement mode of working face and overlying strata characteristics, the theoretical analysis, numerical simulation and field measurement are adopted to analyze the dynamic evolution process of surrounding rock stresses and the movement characteristics of overlying, and the mechanism of pressure burst in step region has been investigated. The results show that: the overlying strata in step region experiences a complex evolution of “OX-S-C”, when it is converted from OX to S, large area of roof rock is breaking and sinking, in large area of roof rock, and the higher the height is, the greater the length of cantilever beam over step region is. Influenced by the overlying rock movement and the mining stress field, the coal and rock mass form a high stress concentration area. The coal-rock mass is suddenly destroyed with releasing elastic strain energy under the action of dynamic load of roof rock, and the pressure burst occurs. The strain energy distribution characteristics are investigated by using software COMSOL under different drilling parameters, and the parameters of drillhole pressure relief are optimized. According to the simulation results, with the increases of borehole diameter, depth and decreasing spacing, the pressure relief effect is more obvious. Considering the engineering application, diameter of 150 mm, depth of 30 m and spacing of 1 m are regarded as the reasonable drilling parameters. This method is applied to the prevention of pressure burst in step region of working face 1302 in Yangcheng coal, and good prevention results have been achieved.

Key words: unequal length working face, step region, pressure burst, overburden strata movement, drillhole pressure relief

中图分类号:

TU 45

李杨杨，张士川，高立群，孔德志，孔贺,. 不等长工作面台阶区域覆岩运动诱冲机制及防治[J]. , 2016, 37(11): 3283-3290.

LI Yang-yang , ZHANG Shi-chuan , GAO Li-qun , KONG De-zhi , KONG He,. Mechanism and prevention of pressure burst in step region based on overburden strata movement of unequal length working face[J]. , 2016, 37(11): 3283-3290.

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不等长工作面台阶区域覆岩运动诱冲机制及防治

Mechanism and prevention of pressure burst in step region based on overburden strata movement of unequal length working face

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