兴隆庄煤矿提高回采上限的试验研究

通过对现代化矿井兴隆庄矿进行不疏降顶水采煤工业性试验，系统地研究了缩采覆岩破坏规律；采用显微技术进行了防不岩的质量评价；利用温度场监测作为安全生产预报手段之一。试采用８个分层工作面，多产煤４０５万ｔ，获得了显著的经济效益；取得了一次提高回采上限２７ｍ的技术突破，将原设计８０ｍ垂高的防水煤柱缩小到５３ｍ，确定了全矿区的防水煤柱设计原则。

EXPERIMENTS WITH EXTENDING THE UPPER EXTRACTION LIMIT FOR XINGLONGZHUANG COAL MINE

A systematic study of overlying strata failure trend for fully mechanized coal face was made in industrial tests of mining under water-bearing layers without water drainage. Microanalyses were also made to assess quality of water-resistance rock pillars. Monitoring of underground environmental temperature field was conducted as one of the forecasting measures for safety mining. In the trial mining 4.05Mt coal was recovered from 8 slices of coal faces, Remarkable economic benefit was achieved. It is a technical breakthrough which extended the upper mining limit up to 27 m,and the water-resistant coal pillar was reduced from 80m to 53m in height. The design principle of water-resistant coal pillars for whole mining area was worked out.