通过对松软煤层的性质及其对巷道的危害分析，探讨了松软煤层中主要运输巷道及硐室支护设计形式及适用条件。
Through analysis to weak coalbed and harmfulness to roadway, main haulage roadway and room supporting design and adaptability condition are discussed in weak coalbed.
通过总结大关山矿硐室爆破的主要特点，并就硐室爆破实施过程中采取的新措施、新办法进行了分析。
Summarizes the main characters of mountain cave blasting in Daguanshan Mine, it also analyses the new method and measure during the blasting process.
应用推荐