用“coal face”造句大全，coal face造句
9、An experimental research on the integrated guarantee system to increase the setting load of coal face single props
12、Based on the study of mechanism of roof weighting in coal face, a expert system for forecasting pattern, inferring strategy, monitoring method and data processing method are established.
15、They work with remote control devices that change the direction, position and speed of a German-made cutting machine that slices back and forth along a 300-metre-wide coal face.
18、Abstract The rational parameters of inducer shotfiring with medium length boreholes to prevent outburst in coal face was probed and the shotfiring results and the effective influencing radius was examined.
2、The wider the coal face, the smaller the radian value, yielding an approximate horizontal line;
5、Automatic lifting of shearer drum is one of key techniques of coal face automation, and its core is identification technique of coal and rock interface.
8、The caving reasons of the rib area in front of supports is analyzed, at the fully mechanized caving coal face, in the hard roof, soft coal, soft bottom and large inclination thick coal bed.
13、This paper discusses a range of fully mechanized coal face to face through the long range, as well as increase its production line to install the system and procedure of implementation.
17、The result shows that the borehole destruction occurs in the dynamic process of coal face advancing, and it is more stable when the borehole location is close to tailgate.
3、Design for drawing out gas with high position boring at coal face
7、Combining with the actual situation in coal face, expound the key technology for large inclined Angle thin seam face so as to assure that slided coal can't come in goaf.
14、Study was conducted on the roof of No. 3604S4 coal face and the actual mining roadway with fractals, and a few kinds of functional values of subsidence velocity of this face were obtained.
1、Analysis of return airway corner abnormal hydrogen concentration in #12612 coal face in Daliuta Coal Mine and control measures applied
10、Dedusting mechanism by water-cloud of wetting agents and the relevant tests for fully-mechanized and roof caving coal face
19、Hanjiawan Coal Mine:strata behaviors regularity and safe mining at coal faces
11、This paper introduces the methods and measures of the adjustment of support tilt caused by ultrahigh mining in fully mechanized coal face.
6、The fast loading technology with the support loading station is successfully applied in the support withdrawing at the fully mechanized coal face in Xinyao Coal Mine.
16、It is important to ascertain geological condition in a coal face or a mine area before mining, so as to secure a high output and high profit mine in safety production.
4、Practice of safe mining in coal face threatened by karst water under high pressure
