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Feb 07, 2017 · KJ311 hydraulic tunneling drilling rig Hydraulic Top Hammer Drilling Jumbo apply to 12-35 square meters section of hard rock mine excavating working.

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Correlations of observed roadheader performance with each author’s combination of laboratory measurements, with or without rock mass characteristics, have led to some success in “ball-park” predictions of future field performance.

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Prediction of roadheader performance plays a significant role in the plan of tunnel construction, which is influenced by different key parameters, including rock strength, discontinuity in rock mass, type and specifications of roadheader machine, and brit

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KJ311 tunnel underground mine drilling is a underground drilling machine, which is designed for 12-35m2 cross section in underground mining operations. Get a free quote drilling rig for tunneling constructions

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It is concluded that roadheader performance could be accurately predicted as a function of unconfined compressive strength, Brazilian tensile strength, rock quality designation, and alpha angle R 2 = 0.987. Sensitivity analysis reveals that the most effec

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2.Application of Tunnel drill machine,KJ311 ,Boomer 281boomer 282 similar model drilling rig for tunnel KJ311 is a hydraulic drifting jumbo designed fo12-35 m2 cross section in underground mining operations. Robust universal drilling boom creates ideal fa

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kj311-type full-hydraulic tunnel jumbo, - Roadheaders

KJ311 Hydraulic Top Hammer Drilling Jumbo. KJ311-type full-hydraulic tunnel jumbo is applicable for hard-rock mine tunneling with section of 12-35m2.

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Feb 06, 2017 · KJ311 hydraulic tunneling drilling rig Hydraulic Top Hammer Drilling Jumbo apply to 12-35 square meters section of hard rock mine excavating working.

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