摘要
针对我国对火成岩侵入工作面安全开采影响研究比较少等问题,采用UDEC数值模拟软件,对不同厚度火成岩侵入工作面的矿压显现及来压规律进行了分析研究。得出了在不同厚度火成岩侵入工作面矿山压力规律:在火成岩侵入时,顶板垮落之前,火成岩侵入面积越大的其前方煤壁处应力增高程度就越高;随着火成岩厚度的增加,顶板初次及周期破断步距逐渐增大,火成岩厚度每增加1 m,顶板初次破断步距增大约3 m,周期破断距离增加约1 m。此研究为我国矿山火成岩侵入条件下的矿山安全开采提供了一定的指导意义。
In allusion to research on the impact of igneous rock intrusion on the safe mining of working face,there was no theoretical basis and technical measures such as safe mining for igneous rock intrusion.Based on the UDEC numerical simulation software,the thickness of the igneous rock and the pressure of the working face were analyzed and studied.The results showed that the stress concentration of the coal seam in the front of the igneous rock was different from that of the igneous rock before the advent of the igneous rock,and the stress concentration of the igneous rock was increased.The first and the cycle of the roof gradually increase the step size,igneous rock thickness of each increase of 1 m,the roof of the first break step increased by about 3 m,the cycle breaking distance increased by about 1 m.This study provided some guiding significance for mine mining under the condition of igneous rock intrusion in China.
出处
《能源与环保》
2017年第8期160-163,168,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
不同厚度
火成岩
数值模拟
矿压显现
来压规律
different thickness
igneous rock
numerical simulation
ground pressure appearing
