With the wide exploitation of coalmineral resources, the problem of ground collapse became more and more serious.
随着我国煤矿的大面积开采，所引起的地面塌陷问题也越来越严重。
2
Conclusion Application of full domestic set of high kV photograph in grassroots coalmineral hospital could improve early diagnosis rate of dust-exposed miners.
结论采用全套国产设备在煤矿医院推广高仟伏摄片对提高接尘工人尘肺的早期诊断具有一定应用价值。
3
On the basis of tectonic evolution in Junggar coal basin and taking coalmineral as "the fossil" and by way of studying the basin formation and tectonic evolution in every stage.