Research Institute of Mining Technology,Taiyuan University of Technology

为了解上覆松软覆岩浅埋深综放工作面的矿压特征并确定其支护强度,以路天煤矿16号煤层1603综放工作面为例,研究了上覆松软覆岩浅埋深综放工作面的顶板垮落步距和支架载荷特征。研究结果表明:浅埋深条件下顶板仍有初次来压与周期来压现象,来压期间载荷增大系数为1.01~2.07,平均1.20,并且载荷增大系数随埋深的增加而减小;浅埋深条件下的1603综放工作面支架支护强度为442~802 k N/m2;支架载荷的平均值随开采深度的增加而增大,且支架循环末工作阻力随初撑力的增大线性增加。据研究结果可得开采深度60~110 m、上覆松软覆岩浅埋深综放工作面支架支护强度计算式,能简单快捷得到该类似条件下综采工作面支架支护强度。

In order to understand the mine strata pressure features of the fully-mechanized top coal caving mining face with a shallow mining depth and overburden so ft strata and to determine the support strength,based on No. 1603 fully-mechanized top coal caving mining face in No. 16 seam of Lutian Mine as an example,the paper stu died the roof falling down step distance and the powered support load features of the fully-mechanized top coal caving mining face with a shallow mining depth under the 0 verburden soft rock strata. The study results showed that under the shallow depth condition,the roof still had an initial roof weighting and pereiodical roof weight phenomen on.During the roof weighting period,the load increased coefficient was 1. 01 ~ 2.07,the average coefficient was 1. 20 and the load increased coefficient would be reduced . with the mining depth increased. Under the shallow depth condition,the support strength of the powered support in No. 1603 fully-mechanized top coal caving mining face was 442 ~ 802 k N 1 m2,the average value of the powered support would be increased with the mining depth increased and the working resistance of the powered support circulation end would be increased in linear with initial setting force increased. According to the study results,the mining depth obtained was 60 ~ 100 m. A calculation form ula of the support strength for the powered supports in the fully-mechanized top coal caving mining face in a shallow mining depth with the overburden soft rock could quic kly obtain the support strength of the powered support in the fully-mechanized coal mining face under the similar condition and the data were reliable and practical.

山西省科技攻关资助项目(2011032101504)；国家自然科学基金资助项目(50974093)；