State Key Laboratory of Coal Mine Disaster Prevention and Control
CCTEG Chongqing Research Institute

随着我国煤炭生产向西部转移,西部尤其是西北地区大量开采低阶煤的矿井瓦斯灾害,成为必须认真面对的重要问题。以陕西黄陇侏罗纪煤田黄陵矿区、旬耀矿区、永陇矿区的6个典型矿井为研究对象,分析总结了矿井瓦斯赋存特征,并从煤层突出危险性单指标、能量、突出动力效应等多个角度探讨了煤层突出危险性。研究表明:黄陇煤田以低变质烟煤为主,煤的破坏程度小、硬度较高,煤层瓦斯普遍呈现高压力、低含量(1.71~4.36m3/t)特征;较低的瓦斯含量使煤层中孕育的瓦斯内能连同弹性潜能低于煤体破碎并抛掷做功所需要的能量值,也不能产生足够多的气体裹挟煤炭在巷道空间运移形成典型的突出灾害;但发生片帮或冲击地压等动力现象时短时间内的大量瓦斯涌出将成为这些矿井主要的瓦斯事故风险。指出陕西侏罗纪煤田的矿井应在做好瓦斯抽采的同时,通过控制好煤壁顶板和冲击地压将能有效减少瓦斯事故的发生。

With the transfer of coal production to the west of China,the coal mine gas disaster in the west,especially in the northwest,has become an important problem that must be faced seriously. Taking typical mines in Huangling,Xunyao and Yonglong mining area of Jurassic coal field of Huanglong,Shaanxi Province as the research objects,the characteristics of coal mine gas occurrence were analyzed and summarized,and the coal seam outburst risk was discussed from the aspects of single index,energy and dynamic effect of coal seam outburst risk. The main conclusions are as follows: the coal in Huanglong coalfield is mainly low-metamorphic bituminous coal,with small degree of coal destruction and relatively high hardness. The gas of the coal seam showing obvious characteristics of high pressure and low content (from 1. 71 m3 / t to 4. 36 m3 / t). Due to the low gas content,the gas potential energy and elastic internal energy in the coal seam lower than the energy value required for coal crushing and throwing to do work,and are not enough to complete the transportation of outburst coal in the roadway space to form a typical outburst disaster. However,a large amount of gas gushing out in a short time will become the main gas accident risk in these mines when dynamic phenomena such as sheet wall or rock burst occur. It is pointed out that the coal wall roof and rock burst should be controlled at the same time of gas extraction in the Jurassic coal field of Shaanxi Province,which can effectively reduce the occurrence of gas accidents.

国家自然科学基金项目(52274246);重庆市自然科学基金项目(cstc2021jcyj-msxmX1149)

孙东玲,曹偈,杨慧明,等.陕西侏罗纪煤层瓦斯灾害特点及突出发生条件的探讨[J].矿业安全与环保,2024,51(3):1-7.

SUN Dongling,CAO Jie,YANG Huiming,et al. Discussion on characteristics and outburst conditions of Jurassic coal seam gas disaster in Shaanxi Province[J]. Mining Safety & Environmental Protection,2024,51(3):1-7.