The paper states the present status of thickseam mining and safety technique in foreign country and technique level of that in China.
介绍了国外厚煤层开采和安全技术的现状，及国内厚煤层开采技术在国际上的水平。
2
The paper provided the optimum roof support parameters of bolt support in soft thickseam. The applied projects have shown the efficiency of the support.
给出了锚杆(索)支护软厚煤顶板的优化支护参数，工程应用证实了其有效性。
3
There are series problems exist in the existing thickseam mining technology with large dip Angle, thus cause low extraction rate, poor safety and high cost.