Compartment-transported material leveling device

The invention relates to a compartment-transported material leveling device, comprising a shelf arranged at the upper part of the compartment and a leveling mechanism arranged on the shelf; wherein the leveling mechanism comprises a plain barreled roll and a grooved roller with axial dimension being smaller than the internal width of the compartment, the plain barreled roll is located behind the grooved roll in the advancing direction of the compartment; at least one convex ridge is arranged at the periphery at the outside of a roller of the grooved roll. In the invention, two leveling rolls: the plain barreled roll and the grooved roll for balancing weight are provided, wherein the grooved roll is used for creating grooves on the material and then the plain barreled roll is used for rolling and compressing the material surface with grooves; so that in the process of compression, the material at the two sides of the grooves can be compressed and rolled to the grooves; as a result, damage ...

Curing agent composition and method for making the same

The invention relates to a rapid high-strength hardener composition for a pelitization substance of mudstone of a laneway base plate of a mine and a method for preparing the same. The composition is prepared through mixing and grinding sulphate aluminium cement clinker, hydrated gypsum, hydrated lime, sodium sulfate, sodium silicate, aluminum potassium sulfate and sodium hydroxide into powder with specific surface area of between 200m<2>/kg and 900m<2>/kg. The rapid high-strength hardener composition carries out reinforcing treatment on the pelitization substance of mudstone and has the advantages of short time for forming a condensate and high strength of the formed condensate.

Method for reinforcing return channel

The invention relates to a method for reinforcing a return channel. The method comprises the following steps: (1) supporting a roof by utilizing anchor stocks, anchor cables, mesh reinforcements, steel beams, single struts and double-row cribworks jointly; and (2) and injecting Marithan into the roof to solidify the roof. By utilizing the anchor stock-anchor cable-mesh reinforcement-steel beam-single strut-double row cribwork joint support mode, the invention reasonably optimizes the support parameters, thereby ensuring the support strength of the return channel; and by using the Marithan product, the invention effectively enhances the support strength of the coal body, thereby achieving the goal of reinforcing the treated region. The method of the invention greatly ensures the safety andenhances the economic benefit. In addition, the invention has the advantages of simple process, convenient operation and low requirements for on-site construction, and can quickly and efficiently reinforce ...

Method and system for negative pressure-induced dust removal in coal preparation plant

The invention discloses a method and a system for negative pressure-induced dust removal. The method comprises that: an atomization plant capable of generating water fog is arranged in a mine roadway,and a plurality of spraying points are arranged according to a temperature and humidity in the mine; the atomization plant comprises a pump station, an air compressor and a plurality of spraying assemblies; and when the atomization plant is used, the coal dust is wetted in advance, the water fog is atomized twice and then rotatably sprayed, and the wetted coal dust is sucked in a dust removing fan, purified by the dust removing fan and then discharged in a mode of slurry water. Compared with the conventional wet type dust removing method, the device of the invention has the advantages of highdust removal efficiency, less water consumption and reliable performance and can more effectively prevent and remove dust in all environments of the coal preparation plant with few influences on coalquality ...

Curing agent composition and method for making the same

The invention relates to a rapid high-strength hardener composition for a pelitization substance of mudstone of a laneway base plate of a mine and a method for preparing the same. The composition is prepared through mixing and grinding sulphate aluminium cement clinker, hydrated gypsum, hydrated lime, sodium sulfate, sodium silicate, aluminum potassium sulfate and sodium hydroxide into powder with specific surface area of between 200m<2>/kg and 900m<2>/kg. The rapid high-strength hardener composition carries out reinforcing treatment on the pelitization substance of mudstone and has the advantages of short time for forming a condensate and high strength of the formed condensate.

Method for preventing top plate from large area collapsing

Top plate control method of Wangeviry coal mining region