六盘水煤田云脚勘查区断层特征及其控煤作用

Fault features and coal control in Yunjiao exploration area of Liupanshui coalfield

六盘水煤田云脚勘查区受赵子河向斜、土城向斜、鲁那断层、丫口寨下拉达断层等北西向及北东向构造影响,发育一系列北西向及北东向为主的断层组合,破坏了煤层的完整性及延续性。本文对勘查区的断层特征进行了详细分析,探讨断层的控煤作用机制,并对煤层开采提出建议。认为云脚勘查区煤层赋存主要受断层影响,落差大于30 m的断层5条,外围断层3条,其中对煤层赋存影响较大的有F_(1)、F_(2)、F_(5),在生产系统布置中应考虑上述断层断煤情况。

Influenced by NW and NE trending structures such as Zhaozihe syncline,Tucheng syncline,Luna fault and Yakouzhai Xialada fault,Yunjiao exploration area in Liupanshui coalfield developed a series of NW and NE trending fault assemblages,which destroyed the integrity and continuity of coal seams.This paper analyzed features of the faults in the exploration area in detail,discussed the coal controlling mechanism of faults,and put forward some suggestions for coal mining.It was considered that the occurrence of coal seams in Yunjiao exploration area was mainly affected by faults.There were 5 faults with a drop greater than 30 m and 3 peripheral faults,among which F_(1),F_(2) and F_(5) had a great influence on the occurrence of coal seams,and the occurrence of coal faults mentioned above should be considered in the layout of production system.