摘要
通过调查观测,作者详细地分析了影响单体液压支柱初撑力低的具体因素,提出了改进意见及措施。
For a high or low setting pressure of a single hydraulic prop, it will directly affect a support quality of a coal face.Base on. the investigation information,it shown that the prop used in the most China coalfaces generally has affect of low setting pressure.Therefore, it is hard to have a supporting performance for the prop. After mornitoring and measurements conducted, the Feng Feng Coal Mine Administration has found the factors affecting setting pressure of the single prop and the factors are as followings; 1.low working pressure of an emulsion power pack; 2.several props lifting simultaneously; 3.several conveyor rames operating simultaneously; 4.several conveyor rames and single props operating simultaneously) 5.low compressive strength of the floor in coalface; 6.unsuitable selection of the roof contacting material; 7.differential betwwen the setting pressure and lifting pressure of the prop; 8.location of the emulsion power pack; 9.prop lifting time too short; 10.'0' seal of injection gun easy to be flushed away; 11.leakage in hose pipeline; 12.unproper operation of miner and 13.leakage in prop.
出处
《煤炭科学技术》
CAS
北大核心
1990年第12期2-5,共4页
Coal Science and Technology
