Construction steps of the inclined rock section

At present, the drilling and boring method and the roadheader method are mainly used for construction.

1. Method for driving rock section of inclined shaft

(1) Mechanical or manual excavation

In the soft rock formation, the inclined well is currently used for mechanical excavation. Small jib tailless excavators are usually used.

(2) Drilling and blasting method

Drilling and blasting construction sequence: blasting design according to lithology - drawing blasting chart - lining the waist line (or laser pointing) - eye-catching - gas inspection - charging - gas inspection - shooting - ventilation - safety, gas inspection - out Hey.

(3) Roadheader tunneling

At present, the roadheader used for the excavation of the inclined rock section is a partial section boring machine, also known as a comprehensive excavator.

Digging Machine process: security check - Digging Machine cutting a temporary excavation support - look for the top dozen top anchor (anchor) eye a shop roof metal roof channel Liangyi An installed a network anchor (anchor Cable) - Cut the help - the anchor bolt eye - laying the metal mesh, steel beam beam - installation anchor.

2. Inclined well construction drainage and transportation

(1) Inclined well construction method

Commonly used mounting machines include bucket loading machines, excavators, loaders, and the like. The bucket rock loader is suitable for inclined wells of any slope, which is conducive to parallel operation. The excavator has strong applicability, especially in rock formations with large water content, which can be used for topping, clearing, and transporting small appliances. The loader is suitable for gentle slope inclined wells, which has fast loading speed and can transport materials and utensils.

(2) Construction method of inclined shaft construction

The operation method of the gentle slope inclined shaft can be carried out by using an explosion-proof trackless rubber tire car, a belt conveyor machine, a shuttle car, and the like. The operation method of the steep slope inclined shaft can be transported by mining car, bucket, and belt conveyor, and a few are transported by shuttle.

(3) Inclined shaft construction to enhance safety facilities

Anti-sports car is an important safety measure for the promotion of inclined shaft. The so-called "three slopes of one slope" is the main measure for preventing sports cars. In addition to this, it is necessary to install an anti-sports guard that can stop the vehicle that is running the rope and is unhooked.

3. Permanent support for inclined shaft construction. Anchor spray support is widely used now.

4. Drainage construction drainage: The drainage method of inclined wells should be determined according to the amount of water inflow and the length of the inclined well. Generally, three-stage drainage is adopted.

(1) Working surface drainage (primary drainage): Commonly used pneumatic turbine submersible pump (commonly known as wind pump), pneumatic diaphragm pump, BQS mine explosion-proof submersible sand pump (commonly known as electric submersible pump).

(2) Two-stage drainage station: The drainage station is located at a distance of at least 5m from the construction equipment of the working face, considering the allowable displacement of the first-stage drainage equipment, and has a margin of 10%. The drainage equipment is equipped with at least two units, one for work and one for standby. The flow rate of each pump should be 2-3 times of the total water inflow, and the head should be larger than the drain to the third stage or to the ground, and there is more than 10% of the surplus. The secondary drainage station moves forward as the work progresses.

(3) Three-stage drainage station

The water from the secondary drainage station is discharged to the ground through the tertiary drainage station. The capacity of the water tank is greater than the capacity of the temporary water tank of the secondary drainage station. The inner diameter of the drainage pipe of inclined shaft construction should not be less than 100mm, and the thickness of the pipe wall should be determined by the strength calculation.

5. Inclined shaft construction ventilation

(1) Ventilation method for single inclined shaft construction: press-in ventilation

(2) Double inclined well construction ventilation

When the wellbore is constructed to a certain depth, in order to solve the problem of long-distance ventilation, the communication lane can be constructed between the two inclined wells, the ventilation system can be adjusted, one wellbore enters the wind, one wellbore returns to the wind, and the local fan can be moved down to contact the upper intake shaft of the lane. At the same time, the temporary fan is returned to the air at the upper end of the return air well.

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