当爆炸发生时，有436名矿工在井下工作。
At the time of the explosion, 436 people were working underground.
他一辈子在矿井下工作。
采用新型软管壁外脉动泵进行井下工作面排水及水仓清理。
The new-type of hose pulsating pump is used for underground face draining and sump cleaning.
井下工作面侧帮超前探测技术是矿井直流电阻率探测新技术之一。
The side leading prospecting technique in underground working face is one of new underground galvanic resistivity prospecting techniques.
将直线电机与抽油泵结合起来置于井下工作，有利于提高系统效率和节能。
The system combined with the linear motor and mining pump helps improve system efficiency and conservation.
井下工作面圆环链主要是采用手工锯断或在加强通风条件下利用火焰割断。
At present, circle chain sawed adopts handwork and cutoff by flame under augmenting ventilation in coal work face of our country.
现场试验表明，这是一种适于井下工作面钻进瓦斯预抽放短钻孔的轻便高效钻机。
The field test indicated that the developed drilling rig is appropriate for underground pre-drainage of coal seams.
同时由于煤矿井下环境复杂，给生产安全带来了巨大的挑战，并给井下工作人员的生命造成了极大的威胁。
For the mine's environment complex, bring tremendous security challenges to the produces, and threat to the life of the staff.
体能测试主要进行60米跑和俯卧撑两个项目，以测试报名学生的身体状况是否能达到井下工作人员要求。
Physical tests are mainly for 60 meter dash and push the two projects, to test whether the physical condition of enrollment of students of staff required to achieve mine.
该节点通过微控制器和无线传输模块实时采集、处理、传输井下工作面的瓦斯浓度、CO浓度、温度、湿度等数据。
The node can collect, process and transmit data of gas concentration, co concentration, temperature and humidity of underground working face by microcontroller and wireless transmission module.
矿用隔爆兼本质安全型饮水机可以解决煤矿井下工作人员的饮水问题，提高井下工作人员的饮水条件和饮用水质量。
Mine-used drinking fountain of flameproof and Intrinsically Safe can solves the drinking problem of underground personnel and improves the drinking condition and quality of drinking water.
提出了一种减小钻井泥浆环空循环压耗的井下工具，介绍了该工具的结构、工作原理、技术参数。
Therefore, a downhole tool that can reduce the annular cyclic pressure loss and introduced its structure, principle of work and technical parameters were put forward.
大多数常规井下工具都是由向上或向下移动、旋转或两者相结合进行工作。
Most conventional downhole tools operate by upward or downward movement, rotation, or a combination of both.
详细介绍了一种新型固井用井下工具——可循环盲板的结构、工作原理及其在漏失井筛管固井中的成功应用。
This paper introduces a new cementing tool named circulating blind pipe, and it's mechanical structure, operation principle and successful applications while cementing a liner in a lost well.
井下工具试验台架主机采用四柱框架式结构，工作平稳、安全可靠；
The test stand adopts four-pole framework structure which ensures smooth and reliable operation.
井下工业性试验表明，该系统具有良好的工作性能及较高的可靠性，远距离遥控操作实现了安全作业。
The testing results show that the system has a good work ability and high reliability, and could also work safely b...
井下工业性试验表明，该系统具有良好的工作性能及较高的可靠性，远距离遥控操作实现了安全作业。
The testing results show that the system has a good work ability and high reliability, and could also work safely b...
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