Ecological restoration method for coal gangue dump

Abstract

The invention provides am ecological restoration method for a coal gangue dump. The method comprises the steps of arranging the coal gangue dump into a gentle slope terrain with an inclination angle of less than 35 degrees, covering the surface of the coal gangue with red soil, and covering the surface of the coal gangue dump with soil for leveling to obtain an arranged coal gangue dump; digging holes at fixed points according to the line spacing of 60 cm and the plant spacing of 40 cm, soaking pigeon pea seeds for germination acceleration, and sowing the pigeon pea seeds soaked for germination acceleration in each hole; or planting vetiver grass seedlings in each hole; soaking pigeon pea seeds for germination acceleration, and planting the soaked and germinated pigeon pea seeds and vetiver grass seedlings at intervals according to holes; then applying farmyard manure, conducting watering every week, and conducting seedling-stage pest and disease damage management, wherein 40% carbendazim suspending agent is used for watering roots in the early stage of seedling-stage morbidity to prevent and control root rot, legume borer adults lay eggs in the peak period, 5% chlorantraniliprolesuspending agent is used for preventing and controlling legume borers, and 40% omethoate emulsifiable concentrate is used for preventing and controlling vetiver aphids, so that ecological restorationof the coal gangue dump is completed. The method is simple, high in operability, low in cost, good in ecological restoration effect of the coal gangue dump and high in greening coverage rate.

Description

Technical field

[0001] The invention belongs to the technical field of ecological restoration of coal gangue hills, and specifically relates to a method for ecological restoration of coal gangue hills. Background technique

[0002] Coal gangue is a solid waste produced in the process of coal mining and processing. It has a lower carbon content and a dark gray rock that is harder than coal. Including roadway excavation, gangue extracted from the roof, floor and interlayer, and gangue extracted from the coal washing process, its emissions account for about 10%-25% of the raw coal and are one of the main pollution sources in the mining area. According to statistics, as of 2017, my country’s coal gangue emissions have reached 7 billion tons, with an annual increase of 300 million tons, occupying about 30,000 hectares of land. And among the nearly 2,000 gangue hills accumulated, more than 300 gangue hills have experienced or are spontaneous combustion. Coal gangue releases large amo...

Examples

Embodiment 1

[0018] The method for ecological restoration of coal gangue hills in this embodiment is:

[0019] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 30cm, and level the covering to obtain the finished coal gangue hill;

[0020] S2, soak the pigeon pea seeds for 8 hours, on the gangue hill after finishing in S1, open holes at fixed points according to the row spacing of 60cm and the plant spacing of 40cm, and sown 2 to 3 pigeon pea seeds after soaking and accelerating germination in each hole. Then apply farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering 2 times a week, each watering volume is 20m 3 / Mu, the seedling stage disease and pest management is carried out. At the early stage of the seedling stage, use a 40% carbendazim suspension with ...

Embodiment 2

[0023] The method for ecological restoration of coal gangue hills in this embodiment is:

[0024] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 15cm, and level the covering to obtain the finished coal gangue hill;

[0025] S2. Soak the pigeon pea seeds for 12h to accelerate germination. On the gangue hill after finishing obtained in S1, open holes at fixed points according to the row spacing of 60cm and the plant spacing of 40cm, and sown 2 to 3 pigeon pea seeds after soaking and accelerating germination in each hole. Then apply farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering twice a week, watering volume is 20m 3 / Mu, the seedling stage pest management is carried out. At the initial stage of the seedling stage, use a 40% carbendazim su...

Embodiment 3

[0028] The method for ecological restoration of coal gangue hills in this embodiment is:

[0029] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 30cm, and level the covering to obtain the finished coal gangue hill;

[0030] S2, soak the pigeon pea seeds for 8 hours, on the gangue hill after finishing in S1, open holes according to the row spacing of 60cm and the plant spacing of 40cm, plant 2 to 3 vetiver seedlings in each hole, and then apply Farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering 2 times a week, each watering volume is 20m 3 / Mu, the seedling stage disease and pest management is carried out. At the early stage of the seedling stage, use a 40% carbendazim suspension with a dilution factor of 1000 to prevent root rot. During the...

Technical field

[0001] The invention belongs to the technical field of ecological restoration of coal gangue hills, and specifically relates to a method for ecological restoration of coal gangue hills. Background technique

[0002] Coal gangue is a solid waste produced in the process of coal mining and processing. It has a lower carbon content and a dark gray rock that is harder than coal. Including roadway excavation, gangue extracted from the roof, floor and interlayer, and gangue extracted from the coal washing process, its emissions account for about 10%-25% of the raw coal and are one of the main pollution sources in the mining area. According to statistics, as of 2017, my country’s coal gangue emissions have reached 7 billion tons, with an annual increase of 300 million tons, occupying about 30,000 hectares of land. And among the nearly 2,000 gangue hills accumulated, more than 300 gangue hills have experienced or are spontaneous combustion. Coal gangue releases large amo...

Examples

Embodiment 1

[0018] The method for ecological restoration of coal gangue hills in this embodiment is:

[0019] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 30cm, and level the covering to obtain the finished coal gangue hill;

[0020] S2, soak the pigeon pea seeds for 8 hours, on the gangue hill after finishing in S1, open holes at fixed points according to the row spacing of 60cm and the plant spacing of 40cm, and sown 2 to 3 pigeon pea seeds after soaking and accelerating germination in each hole. Then apply farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering 2 times a week, each watering volume is 20m 3 / Mu, the seedling stage disease and pest management is carried out. At the early stage of the seedling stage, use a 40% carbendazim suspension with ...

Embodiment 2

[0023] The method for ecological restoration of coal gangue hills in this embodiment is:

[0024] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 15cm, and level the covering to obtain the finished coal gangue hill;

[0025] S2. Soak the pigeon pea seeds for 12h to accelerate germination. On the gangue hill after finishing obtained in S1, open holes at fixed points according to the row spacing of 60cm and the plant spacing of 40cm, and sown 2 to 3 pigeon pea seeds after soaking and accelerating germination in each hole. Then apply farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering twice a week, watering volume is 20m 3 / Mu, the seedling stage pest management is carried out. At the initial stage of the seedling stage, use a 40% carbendazim su...

Embodiment 3

[0028] The method for ecological restoration of coal gangue hills in this embodiment is:

[0029] S1. Organize the coal gangue hill into a gentle slope terrain with an inclination angle of less than 35°, cover the surface of the coal gangue with red soil with a thickness of 30cm, and level the covering to obtain the finished coal gangue hill;

[0030] S2, soak the pigeon pea seeds for 8 hours, on the gangue hill after finishing in S1, open holes according to the row spacing of 60cm and the plant spacing of 40cm, plant 2 to 3 vetiver seedlings in each hole, and then apply Farmyard manure composed of a mixture of chicken manure and sheep manure with a mass ratio of 1:1, and the amount of farmyard manure applied is 1.0×10 5 g / mu, watering 2 times a week, each watering volume is 20m 3 / Mu, the seedling stage disease and pest management is carried out. At the early stage of the seedling stage, use a 40% carbendazim suspension with a dilution factor of 1000 to prevent root rot. During the...