摘要
文章以凤凰山矿石灰岩坚硬顶板条件下XV1304综采工作面生产为背景,采用理论计算和现场实测的方法对顶板结构特征及顶板来压特征进行了分析研究,结果表明:K2石灰岩坚硬顶板分为下、中、上三个分层,各分层强度由下至上逐渐增大,岩层完整性也逐渐提高;总厚约3.9m(厚约1.3m的下分层和厚约2.6m的中分层)的顶板下部分层随机垮落;厚约5.21m的顶板上部分层并未表现出典型的周期来压特征,表现出明显的缓慢下沉特征。
Based on the production condition of XV1304 fully mechanized working face with limestone hard roof in Fenghuangshan coal mine, the paper studied the roof structure and the roof weighting structure through theoretical calculation and field observation. And the result shows that,the K2 limestone roof can be divided into the lower,middle and upper layers,the strength of each layer gradually increases upwards,so as the rock mass integrity; the lower rock of roof is about 3. 9m thick（ with lower layer about 1. 3m thick,and middle 2. 6m）,which falls at random; the upper rock of roof is about 5. 21 m thick,which shows obvious gradual sagging characteristic without typical periodic weighting.
出处
《煤炭工程》
北大核心
2014年第11期54-56,60,共4页
Coal Engineering
