Jackson formed the Astley and Tyldesley Coal and Salt Company, which sank two shafts at St Georges Colliery, commonly known as Back o t Church, to the south of the railway line close to Tyldesley Station. Shortly afterwards in 1866, Nook Colliery No1 Pit, south of Darlingtons original Gin Pit was sunk. The company also sank a pit at Cross Hillock south of the Leigh to Manchester road in Astley but it closed by 1887. These collieries replaced the older pits in the area.

Astley and Tyldesley Collieries were two coal mines located in the historic county of Lancashire, England. The two collieries, which were located close to each other, were owned and operated by the Astley and Tyldesley Collieries Company.

The Astley and Tyldesley Collieries Company was founded in 1881, and the two collieries were operational from 1883 until their closure in the early 1960s. The Astley Colliery was located in the town of Astley, and the Tyldesley Colliery was located in the town of Tyldesley. The two collieries were linked by a railway line, which was used to transport coal from the two sites.

The Astley Colliery was the larger of the two collieries, and at its peak it employed over 1,000 workers. The colliery was equipped with two shafts, which were used to access the coal seams located beneath the surface. The Tyldesley Colliery was the smaller of the two sites, and at its peak it employed around 400 workers. The colliery was equipped with one shaft, which was used to access the coal seams located beneath the surface.

The Astley and Tyldesley Collieries Company was one of the largest coal mining companies in Lancashire, and the two collieries supplied coal to the local area as well as to other parts of the country. The coal mined at the two sites was used to fuel industry and domestic use. The collieries also supplied coal to the Lancashire and Yorkshire Railway Company, which used the coal to fuel its locomotives.

The Astley and Tyldesley Collieries Company was eventually taken over by the National Coal Board in 1947, and the two collieries were closed in the early 1960s due to the decline of the coal industry. The two sites have since been converted into a nature reserve, and the area is now home to a variety of wildlife. The two collieries are a reminder of the importance of the coal industry in Lancashire, and the two sites are a reminder of the hard work and dedication of the miners who worked in the industry.