Method of treating goaf - caving surrounding rock metho…

(1) The method of caving surrounding rock is to fill the goaf with the collapsed surrounding rock to form a cushioning protective rock cushion to prevent the impact of gas surge and mechanical impact on the roadway equipment and human body when the upper part of the rock suddenly collapses. . (2) T ...more...

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Application of post-mortar filling mining method in sta…

1 mining technology strip The Batou molybdenum mine is located at a distance of about 22km from the northwest of Gutian County, Fujian Province, and is under the jurisdiction of Fengpu Township. Geographical coordinates: east longitude 118°39'9.55"-118°40'22.7", north latit ...more...

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Plant protection drones set off a boom, agricultural me…

[ China Agricultural Machinery Industry News ] In order to encourage agricultural machinery cooperatives to introduce new machinery and improve the level of agricultural mechanization, the agricultural machinery department has included plant protection drones in the district agricultural machinery ...more...

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What are the wellbore equipment?

The wellbore equipment includes a tank road, a tank road beam, a ladder room, a bottom hole support structure, an over-winding device, a canister beam, and the like. Wherein the main components of the tank and the tank passage channel for the beam, its function is to eliminate the wobble lift when t ...more...

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The advantages of communicating insecticidal lamps in g…

In the development of green agriculture, pesticides are very backward, and they are completely incompatible with the pest control methods of green agriculture. Therefore, they must be eliminated. The new pest control methods must also be scientific, green and environmentally friendly. Th ...more...

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Japanese railway vehicle gear introduction

System, using a certain quality control system to manufacture high-quality gears. Sumitomo Gear, which is manufactured with rich experience and advanced technology, began to be used in Shinkansen railway vehicles, and later gradually applied to ships, construction industry, machining and other indu ...more...

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Applicable conditions and requirements for shotcrete su…

Shotcrete or its combination with anchors can be used in different types of surrounding rock, mining conditions, mines, copper chambers, and stope works under different working conditions and different engineering spans. However, the following geological conditions are not suitable for the final sup ...more...

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